Eur. Phys. J. Appl. Phys.
Volume 36, Number 3, December 2006
|Page(s)||285 - 287|
|Section||Characterization of Materials: Imaging, Microscopy and Spectroscopy|
|Published online||06 December 2006|
Optical and EPR spectroscopy in pure and blended films of a novel low band gap polymer*
University of Antwerp, Physics Department, CDE,
Universiteitsplein 1, 2610 Antwerp, Belgium
2 Hasselt University, Institute for Materials Research (IMO), Agoralaan Bld. D, 3590 Diepenbeek, Belgium
3 IMEC, Division IMOMEC, Wetenschapspark 1, 3590 Diepenbeek, Belgium
Corresponding author: firstname.lastname@example.org
Accepted: 2 October 2006
Published online: 6 December 2006
Efficient charge transfer between a newly synthesized low band gap (LBG) conjugated polymer and the C60 derivative PCBM is demonstrated. Spectral and time-resolved photoluminescence (PL) measurements show strong quenching and charge separation in the picosecond time range. The charge transfer is further confirmed by light-induced electron paramagnetic resonance (EPR) measurements of both the positive polarons and the fullerene radicals, which can be resolved in high-frequency EPR. The potential for the LBG polymer to act as acceptor was examined in blends with the para-phenylene-vinylene polymer MDMO-PPV. No charge transfer, but instead energy transfer from MDMO-PPV to LBG occurs in these blends, as shown by PL spectroscopy.
PACS: 76.30.-v – Electron paramagnetic resonance and relaxation / 78.66.Qn – Polymers; organic compounds / 81.05.Zx – New materials: theory, design, and fabrication
© EDP Sciences, 2006
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.